Patents by Inventor Shinichiro Kawahara

Shinichiro Kawahara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10111342
    Abstract: Provided is a solder transfer sheet which is capable of increasing the amount of solder to be transferred without the occurrence of bridging. A solder transfer sheet 1A includes a base material 5, an adhesive layer 4 formed on the surface of the base material 5, a solder powder-containing adhesive layer 3 formed on the surface of the adhesive layer 4, and a solder powder layer 2 formed on the surface of the solder powder-containing adhesive layer 3. In the solder powder layer 2, particles of solder powder 20 are arranged in a one-layer sheet form. In the solder powder-containing adhesive layer 3, solder powder 30 and an adhesive component 31 are mixed so as to have such a thickness that two or more layers of the solder powder 30 are stacked.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: October 23, 2018
    Assignees: Senju Metal Industry Co., Ltd., Nitta Corporation
    Inventors: Kaichi Tsuruta, Takeo Saitoh, Manabu Muraoka, Hiroki Oshima, Koji Yamashita, Shinichiro Kawahara
  • Patent number: 10005938
    Abstract: A thermosensitive adhesive contains a side chain crystal polymer having a melting point of 20-30° C., and a tackifier. The side chain crystal polymer is obtainable by adding a metal chelate compound in the following amount of addition (A) into the following copolymer, followed by a crosslinking reaction. Adhesive strength is to be deteriorated at a temperature below the melting point. The copolymer is obtainable by polymerizing 25-30 parts by weight of (meth)acrylate having a straight-chain alkyl group having 16 to 22 carbon atoms, 60-65 parts by weight of (meth)acrylate having an alkyl group having 1 to 6 carbon atoms, 1-10 parts by weight of a polar monomer, and 1-10 parts by weight of a reactive fluorine compound. The amount of addition (A) is 3-10 parts by weight with respect to 100 parts by weight of a copolymer.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: June 26, 2018
    Assignee: Nitta Corporation
    Inventors: Minoru Nanchi, Koji Yamashita, Ayumi Nagao, Shinichiro Kawahara
  • Publication number: 20170354042
    Abstract: Provided is a solder transfer sheet which is capable of increasing the amount of solder to be transferred without the occurrence of bridging. A solder transfer sheet 1A includes a base material 5, an adhesive layer 4 formed on the surface of the base material 5, a solder powder-containing adhesive layer 3 formed on the surface of the adhesive layer 4, and a solder powder layer 2 formed on the surface of the solder powder-containing adhesive layer 3. In the solder powder layer 2, particles of solder powder 20 are arranged in a one-layer sheet form. In the solder powder-containing adhesive layer 3, solder powder 30 and an adhesive component 31 are mixed so as to have such a thickness that two or more layers of the solder powder 30 are stacked.
    Type: Application
    Filed: December 21, 2015
    Publication date: December 7, 2017
    Inventors: Kaichi Tsuruta, Takeo Saitoh, Manabu Muraoka, Hiroki Oshima, Koji Yamashita, Shinichiro Kawahara
  • Patent number: 9598617
    Abstract: Disclosed is an acrylate based adhesive composition for optical use that includes: a copolymer prepared by polymerizing an alkyl (meth)acrylate (wherein the alkyl is a C16 to C22 linear alkyl group) in an amount of about 1 to about 10 parts by weight, an alkyl (meth)acrylate (wherein the alkyl is a C1 to C12 alkyl group) in an amount of about 70 to about 98 parts by weight, and a polar monomer in an amount of about 1 to about 20 parts by weight; and a cross-linking agent. The cross-linking agent is included in an amount of about 0.5 to 5 parts by weight based on 100 parts by weight of the copolymer.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: March 21, 2017
    Assignees: Samsung Display Co., Ltd., NITTA CORPORATION
    Inventors: Dong-Sun Lee, Sang-Hyun Lim, Dae-Guen Choi, Hak-Sun Kim, Shinichiro Kawahara, Minoru Nanchi, Keisuke Sako, Yuta Irie, Satoshi Yamaguchi
  • Publication number: 20160250719
    Abstract: The present solder transfer sheet addresses the issue of providing a solder transfer sheet having both solder powder holding properties and sheet releasing properties and having excellent solder transfer properties. This solder transfer sheet is for soldering in a section to be soldered in a circuit substrate and has: a support base material; an adhesive layer provided on at least one surface of the support base material; and at least one solder layer including solder particles, provided upon the adhesive layer. The adhesive layer contains a side-chain crystalline polymer, exhibits viscosity by having fluidity at at least the melting point of the side-chain crystalline polymer, and decreases viscosity by crystalizing at temperatures less than the melting point of the side-chain crystalline polymer.
    Type: Application
    Filed: November 5, 2014
    Publication date: September 1, 2016
    Inventors: Kaichi Tsuruta, Takeo Saitoh, Manabu Muraoka, Hiroki Oshima, Koji Yamashita, Tomohiro Nishio, Shinichiro Kawahara
  • Publication number: 20160145474
    Abstract: Disclosed is an acrylate based adhesive composition for optical use that includes: a copolymer prepared by polymerizing an alkyl (meth)acrylate (wherein the alkyl is a C16 to C22 linear alkyl group) in an amount of about 1 to about 10 parts by weight, an alkyl (meth)acrylate (wherein the alkyl is a C1 to C12 alkyl group) in an amount of about 70 to about 98 parts by weight, and a polar monomer in an amount of about 1 to about 20 parts by weight; and a cross-linking agent. The cross-linking agent is included in an amount of about 0.5 to 5 parts by weight based on 100 parts by weight of the copolymer.
    Type: Application
    Filed: December 1, 2015
    Publication date: May 26, 2016
    Inventors: Dong-Sun Lee, Sang-Hyun Lim, Dae-Guen Choi, Hak-Sun Kim, Shinichiro Kawahara, Minoru Nanchi, Keisuke Sako, Yuta lrie, Satoshi Yamaguchi
  • Publication number: 20160068727
    Abstract: A thermosensitive adhesive contains a side chain crystal polymer having a melting point of 20-30° C., and a tackifier. The side chain crystal polymer is obtainable by adding a metal chelate compound in the following amount of addition (A) into the following copolymer, followed by a crosslinking reaction. Adhesive strength is to be deteriorated at a temperature below the melting point. The copolymer is obtainable by polymerizing 25-30 parts by weight of (meth)acrylate having a straight-chain alkyl group having 16 to 22 carbon atoms, 60-65 parts by weight of (meth)acrylate having an alkyl group having 1 to 6 carbon atoms, 1-10 parts by weight of a polar monomer, and 1-10 parts by weight of a reactive fluorine compound. The amount of addition (A) is 3-10 parts by weight with respect to 100 parts by weight of a copolymer.
    Type: Application
    Filed: April 24, 2014
    Publication date: March 10, 2016
    Applicant: NITTA CORPORATION
    Inventors: Minoru NANCHI, Koji YAMASHITA, Ayumi NAGAO, Shinichiro KAWAHARA
  • Patent number: 9221231
    Abstract: Disclosed is an acrylate based adhesive composition for optical use that includes: a copolymer prepared by polymerizing an alkyl (meth)acrylate (wherein the alkyl is a C16 to C22 linear alkyl group) in an amount of about 1 to about 10 parts by weight, an alkyl (meth)acrylate (wherein the alkyl is a C1 to C12 alkyl group) in an amount of about 70 to about 98 parts by weight, and a polar monomer in an amount of about 1 to about 20 parts by weight; and a cross-linking agent. The cross-linking agent is included in an amount of about 0.5 to 5 parts by weight based on 100 parts by weight of the copolymer.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: December 29, 2015
    Assignees: Samsung Display Co., Ltd., NITTA CORPORATION
    Inventors: Dong-Sun Lee, Sang-Hyun Lim, Dae-Guen Choi, Hak-Sun Kim, Shinichiro Kawahara, Minoru Nanchi, Keisuke Sako, Yuta Irie, Satoshi Yamaguchi
  • Publication number: 20130126079
    Abstract: Disclosed is an acrylate based adhesive composition for optical use that includes: a copolymer prepared by polymerizing an alkyl(meth)acrylate (wherein the alkyl is a C16 to C22 linear alkyl group) in an amount of about 1 to about 10 parts by weight, an alkyl(meth)acrylate (wherein the alkyl is a C1 to C12 alkyl group) in an amount of about 70 to about 98 parts by weight, and a polar monomer in an amount of about 1 to about 20 parts by weight; and a cross-linking agent. The cross-linking agent is included in an amount of about 0.5 to 5 parts by weight based on 100 parts by weight of the copolymer.
    Type: Application
    Filed: September 6, 2012
    Publication date: May 23, 2013
    Applicants: NITTA CORPORATION, SAMSUNG DISPLAY CO, LTD.
    Inventors: Dong-Sun Lee, Sang-Hyun Lim, Dae-Guen Choi, Hak-Sun Kim, Shinichiro Kawahara, Minoru Nanchi, Keisuke Sako, Yuta Irie, Satoshi Yamaguchi
  • Patent number: 6666752
    Abstract: A wafer retainer includes: a foam layer capable of adsorbing a wafer on a surface thereof in a detachable manner; a first pressure-sensitive adhesive layer formed on a back face of the foam layer; a support formed on a back face of the first pressure-sensitive adhesive layer; a second pressure-sensitive adhesive layer formed on a back face of the support for adhering to a base plate of a polishing machine; and a release sheet releasably attached to the second pressure-sensitive adhesive layer. The second pressure-sensitive adhesive layer includes an adhesive composition. The adhesive composition contains a pressure-sensitive adhesive and a side-chain crystallizable polymer so that the side-chain crystallizable polymer is present in an amount of about 1% to about 30% by weight based on the adhesive composition.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: December 23, 2003
    Assignee: Nitta Corporation
    Inventors: Masayoshi Yamamoto, Toshiaki Kasazaki, Naoyuki Tani, Shinichiro Kawahara, Takashi Ando
  • Patent number: 6663741
    Abstract: An adhesive tape for temporary attachment of green sheets for a ceramic electronic device includes a substrate film and an adhesive layer provided on at least one face of the substrate film. The adhesive layer is composed of an adhesive composition, the adhesive composition containing a side-chain crystallizable polymer, wherein the side-chain crystallizable polymer contains as a component an acrylic acid alkyl ester and/or a methacrylic acid alkyl ester which has a straight-chain alkyl group including 16 or more carbon atoms as a side chain, the side-chain crystallizable polymer having a first-order melting transition occurring in a temperature range narrower than about 35° C., and wherein the adhesive layer has a modulus of elasticity of about 5×104 Pa to about 1×108 Pa.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: December 16, 2003
    Assignee: Nitta Corporation
    Inventors: Eiji Inoue, Toshiaki Kasazaki, Shinichiro Kawahara, Masayoshi Yamamoto, Kiyotaka Nagai
  • Patent number: 6616520
    Abstract: A polishing cloth includes: a polishing cloth substrate; a first-pressure adhesive layer formed on a back face of the polishing cloth substrate; as support formed on a back face of the first pressure-sensitive adhesive layer; a second pressure-sensitive adhesive layer formed on a back face of the support; and a release sheet releasably attached to the second pressure-sensitive adhesive layer. The second pressure-sensitive adhesive layer includes an adhesive composition. The adhesive composition contains a pressure-sensitive adhesive and a side-chain crystallizable polymer so that the side-china crystallizable polymer is present in an amount of about 1% to about 30% by weight based on the adhesive composition. The side-chain crystallizable polymer includes as a main component thereof an acrylic acid ester and/or methacrylic acid ester which has a straight-chain alkyl group including 16 or more carbon atoms as a side chain.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: September 9, 2003
    Assignee: Nitta Corporation
    Inventors: Shinichiro Kawahara, Toshiaki Kasazaki, Naoyuki Tani, Takashi Ando, Masayoshi Yamamoto